Open head foster-style back-up tong

Details Open head foster-style back-up tong Open head foster-style back-up tong

1995-12-14

1998-10-20

Meislin, D. S.

Tools

Wrench, screwdriver, or driver therefor

Machine

81 572, B25B 1350

Patent

active

058230742

ABSTRACT:
An open-head Foster style backup tong has a number of pivoting jaws in mesh with a ring gear. A gap in the ring gear admits tubing into the center of the ring gear, where the tubing is gripped by the jaws when the ring gear is turned. The tong housing is open sided for convenient access and maintenance, and the removable jaws are indexed for easy installation.

REFERENCES:
patent: 3380324 (1968-04-01), Hillman
patent: 4648292 (1987-03-01), Haynes et al.
patent: 4827808 (1989-05-01), Haynes et al.
patent: 5000065 (1991-03-01), Haynes
patent: 5172613 (1992-12-01), Wesch, Jr.

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